diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 9773e3f..048f757 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -27,6 +27,7 @@ jobs:
         php-version:
           - "8.4"
           - "8.5"
+          - "8.6"
         operating-system:
           - "ubuntu-latest"
 
diff --git a/IxDFCodingStandard/Sniffs/NamingConventions/CamelCaseRouteNameSniff.php b/IxDFCodingStandard/Sniffs/NamingConventions/CamelCaseRouteNameSniff.php
index 23f86c5..855867e 100644
--- a/IxDFCodingStandard/Sniffs/NamingConventions/CamelCaseRouteNameSniff.php
+++ b/IxDFCodingStandard/Sniffs/NamingConventions/CamelCaseRouteNameSniff.php
@@ -56,6 +56,6 @@ public function processRouteName(File $phpcsFile, int $stackPointer, array $toke
     private function isCamelCase(string $routeName): bool
     {
         $parts = explode('.', $routeName);
-        return array_all($parts, static fn($part): bool => !(preg_match(self::PATTERN_CAMEL_CASE, (string) $part) !== 1));
+        return array_all($parts, static fn($part): bool => !(preg_match(self::PATTERN_CAMEL_CASE, $part) !== 1));
     }
 }
diff --git a/composer.json b/composer.json
index 0ac2064..dd6b847 100644
--- a/composer.json
+++ b/composer.json
@@ -13,7 +13,7 @@
     "require-dev": {
         "phpunit/phpunit": "^12.4",
         "rector/rector": "^2.5",
-        "vimeo/psalm": "^6.16"
+        "vimeo/psalm": "^7.0"
     },
     "minimum-stability": "dev",
     "prefer-stable": true,